Evaporator.



PQAHTENTIED MAR. 31, 1903 E. R. EDSON. EVAPORATOR.

APPLICATION FILED JAN. 6, 1992.

$0 MODEL.

EZZOH A A fro/M554? UNIT D STATES PATENT OFFICE.

EUGENE R. EDSON, OF CLEVELAND, OHIO, ASSIGNOR TO THE EDSON REDUCTION MACHINERY COMPANY, OF AUGUSTA, MAINE, A COR- PORATION OF MAINE.

EVAPO RATO R.

$PECIFICATION forming part of Letters Patent No. 724,171, dated March 31, 1903.

Application filed January 6, 1902. Serial No. 88,622. (No model.)

This invention relates to improvements in evaporators more especially designed for use as an apparatus for separating naphtha from oil extracted from oil-yieldable material by the treatment of the material with naphtha, and consequently having naphtha mixed therewith.

The object of this invention is to provide an evaporator of the character indicated which has a large evaporating capacity and which is simple in construction.

With this object in view the invention consists in certain features of construction and combinations of parts hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure Iis a side elevation, largely in section, of an evaporator embodying my invention. Fig. II is a vertical section on line II II, Fig. I, looking in the direction indicated by the arrow.

Referring to the drawings, a designates an external casing, which is preferably in the form of a cylinder arranged in a horizontal plane and closed at the ends. The casing a constitutes, therefore, a closed receptacle, into which the liquid, composed of mixed oil and naphtha, is introduced, and the naphtha is vaporized within the chamber of the 'said receptacle, and thereby separated from the oil.

The receptacle a is provided at the top with a vapor-outlet b and is provided at the bottom with a valved drain-pipe 0, having its valve (1 normally closed. Upon opening the said valve d any oil or liquid having accumulated upon the bottom of the chamber of the said receptacle is drained from the receptacle.

The invention which constitutes the subject-matter of this application involves, primarily, an improvement in the formation and arrangement of the heating-sections provided within the receptacle a and forming the vapc'ally, being parallel or approximately parallel,

and each row of heating-sections comprises two series of sections with the sections 6 of one series alternating with the sections f of the other series and with a section 6 forming the u ppermost section of the said row of sections.

Each section 6 comprises, preferably, two up and central chamber g closed at the bottom and open at the top, and the upwardly-diverging side walls of the said chamber are cut away at and along the top thereof, as at The uppermost 10, so that any liquidsuch, for instance, as'

the mixed oil and naphtha-supplied to the said chamber shall overflow at the top of the said uppermost section only at the sides of a the said section, and obviously any liquid thus overflowing from the said trough-shaped section will trickle or flow adown the external surfaces of the side walls of-the said section and thence onto the top of the upperthe internal passage-ways thus formed in the said walls are in open relation.

The two side walls 15 and 15 of each section f meet at the upper extremity or top of the said section f, directly below and centrally of the bottom of the trough-shaped sec tion 6 which is arranged next above the said section f, and consequently any liquid flowing adown the outer surfaces of the side walls 5 of the uppermost section 0 of each row of heating-sections will fall onto the external surfaces of the side walls 15 of the uppermost section fof the series of sectionsf of the said row of heating-sections.

The chamber g of each trough-shaped section e, which has a section f arranged next over the same, is somewhat wider at the top than the width of the said section f at the bottom of the said section f, so that any liquid flowing adown the external surfaces of the side walls 15 of the said section fand leaving the said sectionfat the bottom will be caught within the said chamber g of the said wider section e and fiowadown the side walls of the said chamber, which chamber is pro- \ided at the bottom and centrally with a downwardly-discharging outlet or passage-way h, which extends, preferably, longitudinally and from end to end of the chamber and is arranged to discharge upon the top of the heating-section f arranged next below the said section a. The oil or liquid flowing adown the said walls 15 will pass off at the said outlet or passage-way 7L as rapidly as it reaches the said passage-way, and the sections 0 and fare maintained in a suitably-heated condition during the operation of the apparatus to avoid any thickening of the oil or liquid should the said liquid have any tendency to solidify or thicken at the ordinary atmospheric temperature. Obviously, therefore, the liquid which isto be heated and reduced or concentrated and which is supplied to the uppermost section e of any row of heatingsections flows successively adown the sections 6 and f of the said row of sections and falls and accumulates upon the bottom of the chamber of the receptacle a, whence upon opening the valve dot the drain-pipe c it is conducted 0d from the said chamber, and obviously the naphtha mixed with the said oil preparatory to the delivery of the mixed oil and naphtha to the uppermost section 6 of the said row of heating-sections is vaporized during the downward passage of the liquid and escapes in the form of vapor at the vapor-outlet Z).

A pipe system It for conveying the mixed oil and naphtha to the uppermost troughshaped sections of the rows of heating-sections is provided and has branches Z arranged to discharge into the difierent uppermost heating-sections, respectively.

The heating-sections e and fare heated in any approved manner, and preferably steam or other heating fluid is supplied to the passageways interiorly of the walls of the said sections. For instance, as shown very clearly in Fig. I, a heating-agent-supply pipe on has branches n communicating with the internal passage-ways of the different sections, respectively, of the said row of heating-sections, and a valved discharge-pipe 1- has branches 15 in open relation with and arranged at the bottom of the internal passage-ways of the different sections, respectively, of thesaid row of sections. The valve 1! of the pipe r is of course normally closed, but opened preparatory to establishing a circulation through the connected heating-sections, and the pipe r and its branches u are adapted also to drain the said sections.

The casing a has itsend walls formed by heads 12, which are removably secured by bolts and nuts 18 to the cylindrical shell of the said casing and slidable when detached upon the pipes m, and 7', which extend horizontally through the said heads and are instrumental in supporting the connected heatiug-sections.

WVhat I claim is-- l 1. An evaporator of the character indicated, having an upright row of parallel or approximately parallel heating-sections, which row comprises two series of heating-sections, with the sections of each series alternating with the sections of the other series, with the sections of the series of sections comprising the uppermost section trough-shaped and having upwardly-diverging side walls interiorly hollow or chambered to form passage-ways in the said walls, and with the sections of the other series of heating-sections comprising, respectively, downwardly-diverging side walls hollow or chambered interiorly to form passage-ways in the said Walls, which lastmentioned walls are arranged, respectively, to receive thereon any liquid flowing adown and from the sides of the trough-shaped section arranged next above, and to conduct any liquid flowing adown its said side walls onto the side Walls of the trough-shaped section arranged next below, means for supplying a heating fluid to the aforesaid passage-ways, and means for conducting fluid from the passage-ways.

2. An evaporator comprising the following: a series of parallel or approximately parallel heating-sections arranged at suitable intervals vertically and having, respectively, upwardly-diverging side walls hollow or chambered interiorly to form passage-ways within and longitudinally of the said side walls and each. trough-shaped section, save the uppermost trough-shaped section, having the chamber formed between its side walls provided, at the bottom, with a downwardly-discharging outlet extending longitudinally of the said section; means for supplying a heating fluid to the aforesaid passage-ways; means for conducting fluid from the said passage-ways, and means for supplying a liquid to the chamber formed between the side walls of the uppermost trough-shaped section, and the relative size and arrangement of the parts being such that a trough-shaped section is the uppermost heating-section of the aforesaid heating-sections, that any liquid overflowing from and at-the top of the side Walls of the said uppermost section shall flow adown the outer surfaces of the said walls and thence to the outer IIO surfaces of the downwardly-diverging side walls of the heating-section arranged next below the said uppermost section, and that each trough-shaped section having an outlet at the bottom thereof shall have its side walls arranged to receive liquid from the heatingsection next above and conduct the said liq-,

mid to the said outlet and thence to the downwardly-diverging walls of the heating-section prising the uppermost section trough-shaped and having upwardly-diverging side walls and with the sections of the other series of sections comprising, respectively, downwardlydiverging side walls arranged, respectively, to receive upon the said walls any liquid flowing adown and from the sides of the troughshaped sections arranged next above, and to conduct any liquid flowing adown its said side walls to the side walls of the trough-shaped section arranged next below, means for heating the said sections, and a pipe system having branches arranged to discharge into the uppermost trough-shaped section of the different rows of heating-sections, respectively.

Signed by me at Cleveland, Ohio, this'18th day of December, 1901.

' EUGENE R. EDSON. Witnesses:

O. H. DORER, TELSA SCHWARTZ. 

